The following graph is a depiction of the Starling curve showing the relationship between cardiac output and ventricular end diastolic volume in a patient with congestive heart failure. If this patient is treated with a positive inotropic agent, the Starling curve would do which of the following?
下图是显示充血性心力衰竭患者心输出量与心室舒张末期容积之间关系的Starling曲线。如果该患者接受正性肌力药物治疗，Starling曲线将实现以下哪一项?
(A) Flatten out
(B) Shift down and left
(C) Shift down and right
(D) Shift right only
(E) Shift up and left
(F) Shift up and right
答案解析：
正性肌力药物会增加心脏的收缩力，使每搏输出量和心输出量在任何给定的舒张末期容量均增加。因此曲线会向上向左平移。
正确答案：E
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